<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .box{
            margin: 50px auto;
            width: 200px;
            height: 100px;

            /* background: repeating-linear-gradient(30deg,#79b ,#79b 15px,#58a 0,#58a 30px) ; */
            /* background: repeating-linear-gradient(30deg,#79b 0 15px,#58a 0 30px) ; */
            background: #58a;
            background-image: repeating-linear-gradient(30deg,hsla(0,0%,100%,.1) 0 15px,
                                                                transparent 0 30px);
        }
    </style>
</head>
<body>
    <div class="box">

    </div>
</body>
</html>